Automotive brake device



July 21, ai zs,

' S. G. QCDWN AUTOMOTIVE BRAKE DEVICE Filed Sept. 22, 1922 iNVENTQR SSiDNEN GnDQWN July 21, 19.25.

HOUSE AIR BRAKE COMLANY, OE 'WZLMERDING, PENIBTSYL'VANEA, A SO33? TION OF PENNSYLVANIA.

AUTOMOTIVE BRAKE DEVICE.

Application filed September To all whom it may concern:

Be it known that I, SIDNEY G. Down, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Automotive Brake Devices, of which the following is a specification.

This invention relates to automotive brakes, anrl more particularly to a fluid pressure brake construction adapted for application to the front Wheels of a motor vehicle.

The principal object of my invention is to provicie an improved motor vehicle brake of the above character.

In the accompanying drawing; Fig. 1 is an elevational view, partly-in section, oi a brake mechanism embodying my invention and applied to the front Wheel portion of a motor vehicle; Fig. 2 a section on the line 2-2 of Fig. 1; Fig. 3 a section on the line of l; Fig. 4 a section on the line H of Fig. 1.

In 1 is shown in section a portion 1 of a front Wheel of a. vehicle, the wheel being carried by the usual steering knuckle 2 which is pivotally mounted in the usual front axle 8. Secured to the Wheel 1 is a.

brake drum 4 and mounted in sairlL drum is a non-rotatable brake member 5 adapted to be expanded so as to frictionall v engage the interior face of the drum 4 the rotation ot' acam 6 interposed between the adjacent ends 7 of the brake member 5. "The brake member 5 is non-rotatably supported on pin 8 which is secured to a cover plate 9. said plate being centrally cuppecl and having" a central opening for receiving the WllfiOi bearing pin 10. The plate 9 is securerl to the pin 10, adjacent to the flange portion ll, lov brazing or otherwise.

For operating the brake by fluid under pressure, a brake chamber 12 is carried by the axle 3, being: secured to e supporting member 13, which is mountcci centrally on the The brake chamber 12 contains a. flexible rliaph ragm 1411 for operating a push rod 15 Hind under pressure is supplied to diaphragm.

Preferably. as shown in drawing, a n brain ch ainhcr is em ploved torirperah ing the brakes or both Front Wheels. althou h, it do: red. a separate brake cylinder mav be employed for each front Wheel brake. i Yhen.

W, 1922. Serial 36"). 589,782.

a single brake chamber is employed, a sleeve member 16 may he provirlcd, having-.3 a. hinged connection to an arm 17 which is pivotally connected to the push roel. Operating rods 18 extend in opposite direetions from the sleeve 16, one end of each rocl being sliclably monnteci in the sleeve and having; splines 19 aclaptcd to engage corresponding slots in the sleeve, so that the rorls 18 may be rotated by the rotation the sleevewhile permitting relative lonpgituclinal movement of the rorls.

Each rod 18 is operatively connecteil through a universal joint 20 to the cam oi the corresponding front Wheel brake memher. so that rotation of the rod 18 operates to rotate the cam 6.

l fhen fluirl under pressure is supplies to the brake chamber '12, the riiaphragzln l lonerates to project the push rocl l5, that the sleeve member 16 is roclzccl by i 17 an cl. thereby the rorls 18 are partly rm-at to cause the cams 6 to act on the enris 7 the brake member 5. the brake member beinc thereby expanrlerl to frictionally engage the clrum 4- ancl thus'eause the brakes to be applied. I v

The universal joints Qllprovicle for move-- ment of the front wheels when the Wheels are turned with the steering lrnuclrles steering. While angular anal relative long-i. tmlinal movement oi the rocls 18 is provident for by tn" hinged connection of the sl e '16 to the arm 17 and the sliding connection of the ror'ls 18 in the sleeve 18. N

Having: now (lescriheel my inventioin What I claim as new and (lesire to secure by '1; 3-

tors Patent, is:

1. In amotor vehicle bralre, the comhir tion with a pair of front Wheels or" a izno' vehicle and an axle for saicl Wheels, or co-- operating; brake members associaterl with. each wheel. a brake chamber mounterl on said axle, a movable abutment in saicl her, and means for operatively cont said abutment to a bralre member Wheel.

2. In a. motor vehicle brake, the comb tion with a pair of front wheels of a mute hicle anrl an axle for said Wheels, co-

ernting brake members assoeiatecevrioh ch wheel, a. brake chamber inounterl on said axle, a movable abutment in saicl 0l1$1131- her, rods operatively connecting;

m n ems 1501 permitiing Wieh reepec; said brake chamber, 5 In a, meter ehicle brake, the combine Men with. a, pair 0f front Wheels 01'' a motor vehieie and an aide 01: Wheels, ef c0- brake members associated, with 2. wheel, a, brake chamber mannered on id. meveble abuemene in. seid chamien 'iiludimi sliding" movement the rods v v her, rods operatively corgn eciing said abubmenfr, 1'20 a, brake member of each Wheel, a

and longitudilative angular rods with respect, to said brake chamber.

In testimon my hand.

y whereef I have hereunto set;

SIDNEY e. DOWN. 

